The Distribution of Haloacetic Acids within Drinking Water Treatment Process in Taiwan
Date Issued
2008
Date
2008
Author(s)
Chao, Che-Chi
Abstract
Disinfectants are used in water treatment to control the pathogens, in order to ensure the safety of drinking water. Most water treatment plants use chlorine as the disinfectant. The disinfectant not only kills the pathogenic bacteria but also reacts with the nature organic matter（NOM）to form Disinfection By-Products（DBPs）. The trihalomethanes（THMs） and haloacetic acids（HAAs）are the two groups of major DBPs when using chlorine as the disinfectant. The United States Environmental Protection Agency（U.S. EPA）promulgated the Disinfectants and Disinfection Byproducts rules and the maximum contaminant level for five HAAs is 60μg/L. Five water treatment plants selected and water samples were collected from each treatment process in spring and summer. The EPA Method 552.3 was used to analyze HAA concentrations. The objective of this study is to analyze the effectiveness of water treatment process in removing HAAs. The results showed that the HAA concentrations in summer were higher than in the spring season. The highest HAA concentrations was found in Peng Hu. The rapid sand filtration process in some water treatment plants contributed in removing partial HAAs , especially dichloroacetic acids.
Subjects
Haloacetic acids
Drinking water treatment process
SDGs
Type
thesis
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